Hydraulic drill.



PATENTED JAN. 22, 1907.

W. WoLsKL HYDRAULIC DRILL.

APPLICATION FILED JUNE 22, 1906.

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WACEAW woLsKI, OELEMBERG, AUSTRIA-HUNGARY.

HYDRAULIC DRILL.

Specicaton of Letters Patent.

Patented Jan. 22, 1907.

Application filed June 22, 1906. Serial No. 322.806.

of Austria-Hungary, have invented a newand useful Hydraulic Drill, of which the following is a specification.

There are known hydraulic drills for deep- .well boring purposes in which the live force of the rinsing-water automatically and sud- .denly closes a spring-pressed valve and acts upon a piston for striking the -drill on the bottom of the bore the moment the speed ofthe water has attained `a certain limit. Thus the motion of the valve in these devices is controlled by the speed of the rinsing-water passing throughthe opened valve.

My invention relates to an improvement in such hydraulic drills whereby in opposition to the known devices the motion of the drill is utilized for opening and closing the l valve.

The object of my improvement is to provide two helical springs between which the valve is held, so that it is permitted to swing upward anddownward.

I will now roceed to describe my invention with reference tothe accompanying drawings, in which- Figure 1 is a vertical longitudinal section through a hydraulic drill, the lower part of the drill pro er being shown in elevation', and Fig. 2 is a an of the valve. The drilll proper, M, is guided in a tube A and in its two slots a a and is rigidly connected with a hollow iston K by means of `a tube R. .The piston `is guided in astuiiingboX B of any known construction, and its upper face serves as a seat for a valve P, as is well known. The valve P is shown as provided with four arms p p, the ends of which are guided in a cylindrical vessel C. The stuffing-box B is rigidly connected with the tube A by Ameans of an intermediate tube D with the -aid of screw-threads, as shown. The neck V of the vessel C is connected with the known hollow pump-rods and suspended..

therefrom. The vessel and the parts A and D form a tubular casing for the interior operative parts of the drill. These hollow pump-rods should be provided with an airvessel, als usual.

The piston K is provided at its lower end with a flange 7c, and a helical spring F, tapering upward, is inserted between this flange 7c and the shoulder ofthe tube A, as usual, for pressing the piston upward. The valve P is inserted between two-helical springs f and f 2, of which the upper springf bears against the top ofthe vessel C and the lower spring f2 bears on the stuffing-box B. Normally the valve P is held by the two springsf andf2 ata certain height above the upper face of the piston K and can swing upward and downward.

The hydraulic drill operates as follows: When the water from the respective pump is turned on, it will flow downward through the hollow pump-rods, enter the vessel C, pass beneath the valve P, and How through the hollow piston vK, the tube R, and the bore m of the drill proper, M. After striking the bottom of the bore this water will flow upward through the annular space between the walls of the bore and the outside of the tubes A and D and the vessel C, while rinsing the bore, as usual. When the increasing speed of the water attains a certain limit, the live'force of the water will close the valve P, and the soproduced hydraulic-ram pressure will throw the valve Pand the piston K, with the tube R and the drill M, downward, so that the edge of the drill M will strike the bottom of the bore. s ring F will be compressed, as usual, and also the helical spring f 2. The moment the live force of the water is exhausted it will be overbalanced by the tension of the comressed helical springs F and f2, so that the iielical spring]C2 will detach the valve P from the upper face of the piston K and permit the water to reenter the cavity of the piston K. At the same time the helical spring. F will force the piston K,with the tube R and the drill M, upward, while raising their wei ht until the upper face of the 'piston K touc es the valve P, or nearly so, whereby of course the passage of the water through the piston K is stopped. The hydraulic-ram pressure so produced-that is, the live force of the water-L will then throw the valve P, with the piston K, the tube R, and the drill M, downward to produce the blow of the drill on the bottom of the bore. Henceforward all f the occurrences will repeat.

It is evident that the length of each eriod or the number of blows per minute wil have to depend upon the ratio between the tension of the helical spring F and the own weight of the piston K, the. tube R, and the drill M and Of course during this time the helical that the strength of the blow of thedrill will have to ldepend upon the pressure in the pump which influences the live force ofthe water.

Of course the hydraulic drill may serve all borin purposes of every description. It is equal y obvious that the apparatus may be used for other purposessuch as kerving, stemming of joints, riveting, @cc-after the drilll M has been replaced by the respective too What I claim as my invention, and desire to secure by Letters Patent, is

1. In a hydraulic drill, the combination with a tubular casing adapted to be connected with a hollow pump-rod and to be suspended therefrom, of a stuiing-box in said tubular casing formin two chambers therein,

one above and one be ow said stufiing-box, a'

piston guided in said stuffing-box and formed as a tube, a drill guidedi'n the lower part of said tubular. casing and having a bore for 'the rinsing-water, a `tube connecting said dri-ll with said piston, a helical spring in the lower chamber of said tubular casing and bearing with its u per end on said piston and with its lower en on a shoulder oi' said tubular casing, a plate with a plurality of arms guided in the upper chamber of said tubular casing and adapted to periodically close as a valvev the cavity of' said piston, two helical springsl in the upper chamber otsaid tubular casing on both sides of said plate and adapted toy normall'y hold the latter at a height above said piston.

2; In a hydraulic drill, the combination with a cylindrical vessel having a neck which is adapted to be connected with a hollow pump-rod and to be suspended therefrom, of a stuiing-box screwedI into the lower end of said cylindrical vessel, a piston vertically guided in said stuffing-box and formed as a tube with a flange at the lower end, a plate with a plurality of arms guided in said cylindrical vessel and adapted to periodically close as a valve the cavity of said piston, a first helical spring inserted between said plate and the shoulder of said cylindrical vessel, a second helical spring inserted between said plate and said stuffing-box, a vertical tube screwed on said stuiiing-box, a vertical guiding-tube screwed into the lowery end of said vertical tube, a helical spring tapering upward and inserted between the iiange of said piston and the upper face of saidvertical guiding-tube, a drill Guided in said vertical guiding-tube'and having a bore .for the rinsing-water, and' a tube screwed at its upper end into said piston and at its lower' end into said drill, said rst helical' spring and' said second helical-spring being adapted to normally hold said plate at a height abo-ve' said piston.

In testimony whereof I have signedl my name to thisl speciiicati'on'in theA presence of two subscribing witnesses.

wAoLAw woLsKi. 

